<template>
  <div class="table-container">
    <a-table :columns="columns" :data-source="data" :pagination="false">
      <template
        v-for="col in ['name', 'age', 'address']"
        :slot="col"
        slot-scope="text, record, index"
      >
        <div :key="col">
          <a-input
            style="margin: -5px 0"
            :value="text"
            @change="e => handleChange(e.target.value, record.key, col)"
          />
          <!-- <template v-else>
            {{ text }}
          </template> -->
        </div>
      </template>
      <template slot="operation" slot-scope="text, record, index">
        <div class="editable-row-operations">
          <span v-if="record.editable">
            <a @click="() => save(record.key)">Save</a>
            <a-popconfirm title="Sure to cancel?" @confirm="() => cancel(record.key)">
              <a>Cancel</a>
            </a-popconfirm>
          </span>
          <span v-else>
            <a :disabled="editingKey !== ''" @click="() => edit(record.key)">Edit</a>
          </span>
        </div>
      </template>
    </a-table>

    <a-button class="button" type="dashed" block @click="addRow" v-if="!disabled">
      +  添加
    </a-button>
  </div>
</template>
<script>
const columns = [
  {
    title: '指标名称',
    dataIndex: 'name',
    width: '25%',
    scopedSlots: { customRender: 'name' },
  },
  {
    title: '运算符',
    dataIndex: 'age',
    width: '15%',
    scopedSlots: { customRender: 'age' },
  },
  {
    title: '阈值',
    dataIndex: 'address',
    width: '40%',
    scopedSlots: { customRender: 'address' },
  },
  {
    title: '逻辑符',
    dataIndex: 'address',
    width: '40%',
    scopedSlots: { customRender: 'address' },
  },
  {
    title: 'operation',
    dataIndex: 'operation',
    scopedSlots: { customRender: 'operation' },
  },
]

const data = []
for (let i = 0; i < 4; i++) {
  data.push({
    key: i.toString(),
    name: `Edrward ${i}`,
    age: 32,
    address: `London Park no. ${i}`,
  })
}
export default {
  data () {
    this.cacheData = data.map(item => ({ ...item }))
    return {
      data,
      columns,
      editingKey: '',
    }
  },
  methods: {
    handleChange (value, key, column) {
      const newData = [...this.data]
      const target = newData.filter(item => key === item.key)[0]
      if (target) {
        target[column] = value
        this.data = newData
      }
    },
    edit (key) {
      const newData = [...this.data]
      const target = newData.filter(item => key === item.key)[0]
      this.editingKey = key
      if (target) {
        target.editable = true
        this.data = newData
      }
    },
    save (key) {
      const newData = [...this.data]
      const newCacheData = [...this.cacheData]
      const target = newData.filter(item => key === item.key)[0]
      const targetCache = newCacheData.filter(item => key === item.key)[0]
      if (target && targetCache) {
        delete target.editable
        this.data = newData
        Object.assign(targetCache, target)
        this.cacheData = newCacheData
      }
      this.editingKey = ''
    },
    cancel (key) {
      const newData = [...this.data]
      const target = newData.filter(item => key === item.key)[0]
      this.editingKey = ''
      if (target) {
        Object.assign(target, this.cacheData.filter(item => key === item.key)[0])
        delete target.editable
        this.data = newData
      }
    },
  },
}
</script>
<style lang="scss" scoped>
.editable-row-operations a {
  margin-right: 8px;
}

.button {
  margin-top: $margin-xs;
}
</style>
